Warning when cross-compiling for Windows on Go 1.11

[botherder]

I'm not sure if this is of any interesting, but this warning is raised when cross-compiling for Windows on Go 1.11:

GOOS=windows GOARCH=amd64 CGO_ENABLED=1 CC=x86_64-w64-mingw32-gcc PKG_CONFIG_PATH=${YARA_SRC}/x86_64-w64-mingw32/lib/pkgconfig go install -ldflags '-extldflags "-static"' github.com/hillu/go-yara                
# github.com/hillu/go-yara
../../.gvm/pkgsets/go1.11/global/src/github.com/hillu/go-yara/rules_yara34.go: In function ‘_yr_rules_scan_fd’:
../../.gvm/pkgsets/go1.11/global/src/github.com/hillu/go-yara/rules_yara34.go:30:34: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
   return yr_rules_scan_fd(rules, (YR_FILE_DESCRIPTOR)fd, flags, callback, user_data, timeout);

[hillu]

@botherder The warning occurs for 64bit Windows builds, regardless of Go compiler. Things still work, after all this is "just" a warning. Which is a thing no sensible/serious C programmer would ever say in public. (go figure...), so I'm going to fix this.

[botherder]

Thanks for the fast reply.
I'm trying to triage also this when building for 64bit Windows:

/home/nex/.gvm/gos/go1.11/pkg/tool/linux_amd64/link: running x86_64-w64-mingw32-gcc failed: exit status 1
/usr/bin/x86_64-w64-mingw32-ld: i386 architecture of input file `/tmp/go-link-888075984/000000.o' is incompatible with i386:x86-64 output
collect2: error: ld returned 1 exit status```

I'm building with GOOS=windows GOARCH=amd64 CC=x86_64-w64-mingw32-gcc CGO_ENABLED=1. What am I doing wrong?

[hillu]

@botherder no idea for the second problem, sorry.

[botherder]

Yeah. I can't quite figure it out. I'm only managing to build 32bit on Windows at the moment.

[hillu]

Does the same thing happen with previous Golang versions?

[hillu]

@botherder I see that you have made a release. Nice, congratulations! Have you figured out what went wrong with your 64bit build?

[botherder]

Not yet, that's on the TODO. Thanks for your help though! And thanks for this library of course.